1 /*
2 * CDDL HEADER START
3 *
4 * The contents of this file are subject to the terms of the
5 * Common Development and Distribution License, Version 1.0 only
6 * (the "License"). You may not use this file except in compliance
7 * with the License.
8 *
9 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
10 * or http://www.opensolaris.org/os/licensing.
11 * See the License for the specific language governing permissions
12 * and limitations under the License.
13 *
14 * When distributing Covered Code, include this CDDL HEADER in each
15 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
16 * If applicable, add the following below this CDDL HEADER, with the
17 * fields enclosed by brackets "[]" replaced with your own identifying
18 * information: Portions Copyright [yyyy] [name of copyright owner]
19 *
20 * CDDL HEADER END
21 */
22 /*
23 * Copyright (c) 1994, by Sun Microsytems, Inc.
24 */
25
26 #pragma ident "%Z%%M% %I% %E% SMI"
27
28 /*
29 * Function to allocate memory in target process (used by combinations).
30 */
31
32 #ifndef DEBUG
33 #define NDEBUG 1
34 #endif
35
36 #include <assert.h>
37 #include "tnfctl_int.h"
38 #include "prb_internals.h"
39 #include "dbg.h"
40
41
42 /*
43 * _tnfctl_targmem_alloc() - allocates memory in the target process.
44 */
45 tnfctl_errcode_t
_tnfctl_targmem_alloc(tnfctl_handle_t * hndl,size_t size,uintptr_t * addr_p)46 _tnfctl_targmem_alloc(tnfctl_handle_t *hndl, size_t size, uintptr_t *addr_p)
47 {
48 int miscstat;
49 tnf_memseg_t memseg;
50
51 assert(hndl->memseg_p != NULL);
52 *addr_p = NULL;
53
54 /* read the memseg block from the target process */
55 miscstat = hndl->p_read(hndl->proc_p, hndl->memseg_p, &memseg,
56 sizeof (memseg));
57 if (miscstat)
58 return (TNFCTL_ERR_INTERNAL);
59
60 /* if there is memory left, allocate it */
61 if ((memseg.min_p + memseg.i_reqsz) <= (memseg.max_p - size)) {
62 memseg.max_p -= size;
63
64 miscstat = hndl->p_write(hndl->proc_p, hndl->memseg_p,
65 &memseg, sizeof (memseg));
66 if (miscstat)
67 return (TNFCTL_ERR_INTERNAL);
68
69 *addr_p = (uintptr_t) memseg.max_p;
70
71 DBG_TNF_PROBE_2(_tnfctl_targmem_alloc_1, "libtnfctl",
72 "sunw%verbosity 3",
73 tnf_long, size_allocated, size,
74 tnf_opaque, at_location, *addr_p);
75
76 return (TNFCTL_ERR_NONE);
77 } else {
78 return (TNFCTL_ERR_INTERNAL);
79 }
80 }
81